Ok, I just finished adding water to my tank and I set up my XP3 but the filter part doesn't seem to be working. I bought the filter used off another member so I don't have any instructions so I'm lost. I filled up the filter with water, plugged in the top, I have the two outlets in the tank but it only appears that the one outlet that puts water back into the tank is really working. I put my hand in front of the outlet that sucks the water out to be filtered and I can't feel anything, and I see little particles just slowly floating past it. Did I do something wrong when I set it up?